Question

An element a which is a part of common salt and kept under kerosene reacts with another element B of atomic number 17 to give a product c.when an aqueous solution of product c is electrolysed then a compound D is formed and two gases are liberated
(a) what are A and B ?
(b) Identify C and D.
(c) what will be the action of C on lit.us solution? why ?
(d) State whether element B is a solid, liquid or gas at room temperature
(e) write formula of the compound formed when element B reacts with an element E having atomic number 5​

Answer 1

Answer:

compound a is sodium (Na)

compound b is chlorine(Cl)

compound c is sodium chloride or common salt(NaCl)

compound d is sodium hydroxide (NaOH)

Explanation:

a)sodium(Na)and chlorine(Cl)

b)sodium chloride (NaCl), sodium hydroxide(NaOH) the two gases liberated are hydrogen(H2) and chlorine (Cl2)

c)the aqueous solution of sodium chloride do not change the colour of either the red litmus paper or the blue litmus paper ,this is because an aqueous solution of sodium chloride is a neutral salt.

d) chlorine is a yellow green gas at room temperature

e)when chlorine reacts with an element having atomic number 5 i.e, boron it forms a compound namely boron trichloride BCl3

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